Thermal conductivity measurement of insulating materials with a three layers device

✍ Scribed by Y. Jannot; A. Degiovanni; G. Payet

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 305 KB
• Volume: 52
• Category: Article
• ISSN: 0017-9310
• DOI: 10.1016/j.ijheatmasstransfer.2008.09.017

✦ Synopsis

This paper presents a new method dedicated to thermal conductivity measurement of low-density insulating materials. The three layers experimental device (brass/sample/brass) and the principle of the measurement based on a pulsed method are presented. The three-dimensional modelling of the system is used for a sensitivity analysis. The estimation method is described and applied to experimental measurements carried out at atmospheric pressure and under vacuum. We conclude that the thermal conductivity is estimated with a precision better than 5% and that the precision of the thermal diffusivity estimation depends on the density of the material.